Function lang_index_files

tests/test_lang_contract.c:108–139

Write each fixture file into a fresh temp project, index it via the MCP * production flow (discover -> extract -> registry -> resolve -> dump), and open * the resulting graph DB. Returns the store (NULL on any failure). */

 * production flow (discover -> extract -> registry -> resolve -> dump), and open
 * the resulting graph DB. Returns the store (NULL on any failure). */
static cbm_store_t *lang_index_files(LangProj *lp, const LangFile *files, int nfiles) {
    memset(lp, 0, sizeof(*lp));
    snprintf(lp->tmpdir, sizeof(lp->tmpdir), "/tmp/cbm_lc_XXXXXX");
    if (!cbm_mkdtemp(lp->tmpdir)) {
        return NULL;
    }
    lc_to_fwd_slashes(lp->tmpdir);
    for (int i = 0; i < nfiles; i++) {
        char path[700];
        snprintf(path, sizeof(path), "%s/%s", lp->tmpdir, files[i].name);
        /* Create parent directories if the fixture name embeds subdirs.
         * Use mkdir_p (not mkdir) so multi-level paths like
         * "pkg/validation/x.go" create every intermediate directory. */
        char *slash = strrchr(path, '/');
        if (slash && slash > path + strlen(lp->tmpdir)) {
            *slash = '\0';
            cbm_mkdir_p(path, 0755);
            *slash = '/';
        }
        /* Binary mode: keep fixture line endings exactly as written ("\n").
         * Windows text mode rewrites "\n"→"\r\n", which makes line-ending-
         * sensitive grammars under-extract (below_min / calls_breadth). */
        FILE *f = fopen(path, "wb");
        if (!f) {
            return NULL;
        }
        fputs(files[i].content, f);
        fclose(f);
    }

    return lang_open_indexed(lp);
}

/* Convenience: index a single fixture file. */
static cbm_store_t *lang_index(LangProj *lp, const char *filename, const char *content) {